21St International Conference on Pattern Recognition, Icpr 2012, Date: 11 November 2012 through 15 November 2012, Location: Tsukuba, Sponsors: Science Council of Japan;Information Processing Society of Japan (IPSJ);Inst. Electron., Inf. Commun. Eng. (IEICE) Inf. Syst. Soc. (ISS);Japan Society for the Promotion of Science (JSPS);The Telecommunications Advancement Foundation